磁集成开关电容高增益级联Boost变换器

Magnetic Integrated Switch Capacitor High-gain Cascaded Boost Converter

为进一步改善基本级联Boost变换器的电压增益等关键性能,提出了一种磁集成开关电容高增益级联Boost变换器。该变换器利用拆分开关电容的两个倍压单元,使之与级联变换器的前级储能结构重新组合,同时将磁集成技术应用其中,一方面实现高电压增益,同时减小开关管的电压应力与电感电流纹波。分析变换器的各个工作模态,推导出性能参数,给出了磁集成设计方案,最后通过仿真和实验样机实验,验证了理论分析的正确性。

To improve the key performance of a basic cascaded Boost converter including its voltage gain,a magnetic integrated switch capacitor high-gain cascaded Boost converter is proposed.Two voltage doubling units in the switch capacitor are split and further recombined with the pre-stage energy storage structure in the cascaded converter,where the magnetic integration technology is applied simultaneously.As a result,high voltage gain is realized while reducing the voltage stress and inductance current ripple in the switch.The working modes of the converter are analyzed,the performance parameters are derived,and the magnetic integrated design scheme is given.Finally,the theoretical analysis was verified by simulations and the production of a prototype.